Production of cold glaze wall and floor plates



Patented Mar. 3', 1925.

UNITED STATES PATENT OFFICE.

ALPHONSE KO'ENIG, OF STRASBOUBG, FRANCE, ASSIGNOR '.I. 0 PAUL HOFER AN D PAUL PHTLIPPI. OF BASEL, SWITZERLAND PRODUCTION OF GOLD GLAZE WALL AND. FLOOR PLATES.

No Drawing.

plates. The plates consist of two differentlayers, namely the actual plate or pottery layer and a glaze layer. For the production of the pottery layer white sand, terrazo,

1 magnesite, magnesium chloride and alum are used, terrazo being a ground mass of marble or the like; the glaze layer is composed of borax, casein, magnesium sulfate or Epsom salt, magnesite together with the 2 desired mineral color.

Mixtures which give practical results free from objection are as follows (a) For the plate or pottery layer kg. of white dr sand, 2.5 kg. of white terrazo, 4 ,kg. of w itefinely ground magnesite of 78-80% content, 3.6 L of a magnesium chloride solution of 25 B, 0.25 L of an alum solution of 6 B, and 0.75 L of water.

(b) For the glaze layer 20 g. of borax, 2 teaspoonfuls casein, 250 300 g. of white finely ground 78-90% magnesite, 150-250 g. of a colorin m'ratter according to the desired shade an IJof a magnesium sulfate or Epsom salt solution of 22 B.

For the production of the plate or pottery layer the sand, terrazo and magnesiteare weighed out and intimately mixed with one another, then the ma esium chloride solution and thereupon t e alum solution are 40 added to the mass while constantly stirring, and the resulting pulp is well stirred and. reduced to a thin fluid by the addition of water. For the preparation of the glaze layer, the borax is heated to boiling point in aboutl/ L of water and after cooling the given quantity of casein is added to the solution. Then a pulp of magnesite, coloring matter and magnesium sulfate or Epsom salt solution of 22 B. is made to which Application-filed September 22, 1924. Serial No. 739,207.

.are added, while continuously stirring,

about 20 drops of the previously prepared bora-x-casein solution and finally as much again Epsom salt solution is added, so that a pulpy mass is produced. A suitable thickness of this pulpy mass is spread on a smooth glass plate, which is then laid into a mould with the glaze layer at the top, and the mould is then filled with the pottery mixture for forming the plate body while this mixture is still soft and plastic. The whole is left for some time to set, the glass plate and the mould are removed after drying and hardening and the upper surface of the glaze layer is eventually coated with a transparent lacquer varnish. As coloring matter lithopone is preferably used forvwhite plates, zinc green for green plates, and for plates of other colors the usual mineral colors such as cement yellow, cement red, cement manganese black etc. are employed.

Firing of the finished plates is not necessary, as they are completely .finished after drying without further operations. They are entirely acid proof and have the same re- The glaze does not split or crack; the plates can be made of small thickness and their homogeneous structure allows of easy trimmiing with stoneworking tools.

What I claim is o sistance to-mechanical action as fired plates.

1. A process for the production of cold glaze wall and floor plates in which a pulpy glaze mixture is formed of watery borax solution, casein, white finely ground magnesite, mineral coloring matter and Epsom salt solution, then spread on a glass plate arranged in a mould and while still soft and plastic is s read over with a mixture of white dry san white terrazo, white finely ground magnesite, magnesium chloride solution, alum solution and water, the glass plate andthe mould being removed after hardening.

2. .A wall of floor plate composed of two interconnected layers, one of them being formed of a watery borax solution, casein,

white finely ground magnesite, mineral coloring matter and Epsom salt solution, the In witness whereof I have hereunto signed 7 other being formed of clr sand, white termy name this 9th day of Se tember, 1924,

razo, white finely groun magnesite, magin the presence of two subscri witnesses. nesium chloride solution, alum solution and ALPHONSE I OENIG.

6 water, and. obtained with the aid of a. glass Witnesses:

- plate and a mould according to the process CHESTER W. DAvIs,

above referred to. MARTHE STEINEBRUN. 

